Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash Flows From Operating Activities:
Net income	$ 290	$ 262
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	395	379
Amortization of nuclear fuel	20	18
Amortization of debt issuance costs and premium/discounts	5	5
Deferred income taxes and tax credits, net	116	44
Allowance for equity funds used during construction	(16)	(9)
Stock-based compensation costs	7	8
Other	7	16
Changes in assets and liabilities:
Receivables	(68)	52
Inventories	93	54
Accounts and wages payable	(291)	(284)
Taxes accrued	(8)	70
Regulatory assets and liabilities	(70)	(95)
Assets, other	0	15
Liabilities, other	(10)	13
Pension and other postretirement benefits	(39)	(56)
Net cash provided by operating activities	431	492
Cash Flows From Investing Activities:
Capital expenditures	(1,064)	(890)
Nuclear fuel expenditures	(18)	(12)
Purchases of securities – nuclear decommissioning trust fund	(107)	(70)
Sales and maturities of securities – nuclear decommissioning trust fund	93	66
Other	9	0
Net cash used in investing activities	(1,087)	(906)
Cash Flows From Financing Activities:
Dividends on common stock	(191)	(178)
Dividends paid to noncontrolling interest holders	(1)	(1)
Short-term debt, net	108	332
Maturities of long-term debt	(300)	0
Issuances of long-term debt	1,099	347
Issuances of common stock	13	10
Employee payroll taxes related to stock-based compensation	(13)	(8)
Debt issuance costs	(11)	(5)
Net cash provided by financing activities	704	497
Net change in cash, cash equivalents, and restricted cash	48	83
Cash, cash equivalents, and restricted cash at beginning of year	328	272
Cash, cash equivalents, and restricted cash at end of period	376	355
Union Electric Company
Cash Flows From Operating Activities:
Net income	43	26
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	222	212
Amortization of nuclear fuel	20	18
Amortization of debt issuance costs and premium/discounts	2	2
Deferred income taxes and tax credits, net	104	27
Allowance for equity funds used during construction	(8)	(9)
Other	4	17
Changes in assets and liabilities:
Receivables	0	43
Inventories	42	9
Accounts and wages payable	(250)	(222)
Taxes accrued	(9)	92
Regulatory assets and liabilities	(81)	(24)
Assets, other	19	2
Liabilities, other	3	4
Pension and other postretirement benefits	(14)	(20)
Net cash provided by operating activities	97	177
Cash Flows From Investing Activities:
Capital expenditures	(658)	(466)
Nuclear fuel expenditures	(18)	(12)
Purchases of securities – nuclear decommissioning trust fund	(107)	(70)
Sales and maturities of securities – nuclear decommissioning trust fund	93	66
Money pool advances, net	43	0
Net cash used in investing activities	(647)	(482)
Cash Flows From Financing Activities:
Dividends on common stock	(50)	0
Dividends on preferred stock	(1)	(1)
Short-term debt, net	629	274
Money pool borrowings, net	0	(306)
Issuances of long-term debt	0	347
Debt issuance costs	0	(3)
Net cash provided by financing activities	578	311
Net change in cash, cash equivalents, and restricted cash	28	6
Cash, cash equivalents, and restricted cash at beginning of year	17	10
Cash, cash equivalents, and restricted cash at end of period	45	16
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	236	215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	159	153
Amortization of debt issuance costs and premium/discounts	2	1
Deferred income taxes and tax credits, net	29	27
Allowance for equity funds used during construction	(7)	0
Other	3	5
Changes in assets and liabilities:
Receivables	(78)	1
Inventories	51	49
Accounts and wages payable	(34)	(31)
Taxes accrued	0	64
Regulatory assets and liabilities	8	(66)
Assets, other	(18)	11
Liabilities, other	8	8
Pension and other postretirement benefits	(17)	(22)
Net cash provided by operating activities	342	415
Cash Flows From Investing Activities:
Capital expenditures	(363)	(373)
Other	0	1
Net cash used in investing activities	(363)	(372)
Cash Flows From Financing Activities:
Dividends on common stock	(75)	0
Short-term debt, net	101	58
Money pool borrowings, net	(37)	(81)
Maturities of long-term debt	(300)	0
Issuances of long-term debt	350	0
Debt issuance costs	(4)	0
Net cash provided by financing activities	35	(23)
Net change in cash, cash equivalents, and restricted cash	14	20
Cash, cash equivalents, and restricted cash at beginning of year	302	234
Cash, cash equivalents, and restricted cash at end of period	$ 316	$ 254